Mining methods and costs at the Ground Hog Unit, Asarco Mining Co., Vanadium, New Mexico /
by F.W. Richard.
|Main Author:||Richard, F. W.|
[Washington, D.C.] : U.S. Dept. of Commerce, Bureau of Mines, 1930.
Copper mines and mining
Copper mines and mining /
Zinc mines and mining > Zinc mines and mining / New Mexico.
Lead mines and mining > Lead mines and mining / New Mexico.
13 p. :
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